condition mean min max ZT0-3 0.20914 0.20914 0.20914 ZT4-7 0.29181250000000003 0.29181250000000003 0.29181250000000003 ZT8-11 0.2289685 0.2289685 0.2289685 ZT12-15 0.34259399999999995 0.34259399999999995 0.34259399999999995 ZT16-19 0.65143 0.65143 0.65143 ZT20-23 0.23868899999999998 0.23868899999999998 0.23868899999999998